NCtfU - Misc
Steganograhpy
Part 1(?)
Image
Tools
- file
- strings
- binwalk
Tools
- exiftool
- stegsolve
- steghide
- JPG, BMP, WAV
- zsteg
- PNG, BMP
WarmUp
PicoCTF 2019 - extension
PicoCTF 2021 - information
`file`
`exfitool`
PNG
Structure
- Header (magic)
-
89 50 4E 47 0D 0A 1A 0A
-
- IHDR
- PLTE
- IDAT
- IEND
More: Wiki
Image source: https://github.com/HugoJH/HideIntoPNG
Tools
- pngcheck
- check png errors
- PCRT.py
- automatically fix CRC errors
Challenges
SWCTF - 耗子尾汁
SWCTF - PNG
picoCTF 2021
MilkSlap
VolgaCTF 2021 Qual
Chosen Ones
Useful Links
Thanks for listening!
NCtfU - Misc
By Tony Yang
NCtfU - Misc
stego
